Improvement in machines for forming strap-hinges



, ZSheets-Sheetl. c. LANZ. MACHINE S FOR FORMING STRAP 'HINGES. 184 4 Patented Nov. 14, 1876.

2 Sheets-S11eetxz.v C. LAN Z.

MACHINES FOR FORMING STRAP HINGES. No.184,Z4;8 Patented Nov.14,187 6.

F If, 2.

J g u I MITUESSES I InxfeuTuT M waflwz UNITED STATES PATENT OFFICE.

CHARLES LANZ, OF PITTSBURG, PENNSYLVANIA.

IMPROVEMENT m MACHINES FOR FORMING STRAP-HINGES.

Specification forming part of Letters Patent N 0. 184,248, dated November l l, 1876; application filed April 17, 1876.

consists in bending-dies, movable mandrel,

hammer, punch,and necessaryanvils, arranged and operating substantially as hereinafter described.

To enable others skilled in the art to make and use my invention, I will proceed to describe its construction and operation.

In the accompanying drawings, which form part of my specification, Figure 1 is a front elevation of my improvement. Fig. 2 is an end elevation. Fig. 3 is a vertical section at line y of Fig. 1. Fig. 4. is a detailed view representing the position of the bending-die in making the first bend in the blank. Fig. 5 is a detailed view representing the position of the bending-die in making the second. bend, which completes the formation of the eye of the hinge. Fig. 6 represents the blank having the first bend made in it. Fig. 7 represents the blank having the second bend made in it, which completes the formation of the eye of the hinge.

In the accompanying drawings, A represents the frame of the machine B, the bend ing-die placed on the end of the shaft 0, which is provided with a wheel, D, operated by a rack, e, to which is imparted a reciprocating motion through the medium of the pitman f, the lower end of which is attached to the sliding head g, in which is placed a bendingdie, h. The upper end of the pitman f is at tached to a crank, i, on the end of the shaft j, which is'furnished with cams k l, which impart to lever m a reciprocating motion, which lever is pivoted at n to a cross-bar, 0. The

lower end of the lever m is provided with a recess, 11, in which is placed a pin, 1, projecting from a sliding rod, 8, to the outer. end of which is secured an arm, t, the lower end of which is secured to the mandrel u, the inner end of which enters a recess in the b ending die B, which recess is concentric with the axis of the shaft 0. On the end of the shaft j is a compound cam, '11, the part c of which raises the cam-yoke m, which raises the hammer 1 and punch y. The part of the cam marked a (represented by dotted lines) is for imparting the downward motion to the punch 3 the hammer and punch being secured in a sliding head attached to the cam-yoke m. 0

represents the anvil for the punch y, and is furnished with an opening corresponding to the size of the being removable for adapting the machine for punching diii'erent-sized openings in the strap of the hinge. 6 represents the anvil of the straightening-hammer y. f

which an vil is adjusted through the medium of the-wedge base-piece g, which is adjusted through the medium of the screw h and the screw-nuts 6', arranged on each side of the projecting lug j. The adjusting of the anvil f is to adapt it and the bending-dies to the different thicknesses of iron which may be used in the construction of the strap part of the hinge. The wheel D is loose upon the shaft 0, which is furnished with a clutch, is, which operates against a projection, b, on the side of the wheel D. When the shaft has been rotated so as to rotate the bending-die, the motion of the shaft 0 is reversed through the medium of the spring m. The iron is inserted over the anvil f, with a portion of it resting upon the bending-die. The downward stroke of the bending-die h, striking upon the iron, bends it, as indicated in Fig. 6; the die then rises, and the cam lmoves the upper end of the pivoted lever n to the right, which moves the lower the bending dies,

end of it to the left, which causes the sliding bar s to travel in the same direction, which will, through the medium of thearm 13, cause the mandrel a (over which the eye of the hinge is formed) to move over, bringing it over the blank at this point. The projection on the side of the wheel D comes in contact with the clutch on theshaft O, and turns the bendpunch, the punch and anvil represents an" adjustable anvil, used in combination with 2 I mamas ing-die B, so thatthe die will bend the blank around the mandrel, as indicated in Fig. 5. At this point the upper end of the pivoted lever m is moved to the left by means of the cam 70, which will move the lower end of the lever to the right, which will withdraw the mandrel on. At this point the downward movement of the rack reverses the motion of the wheel D, which allows the spring m to reverse the motion of the shaft (J, thereby throwing back the dies, and allows the operator to remove the blank from the machine, which may be straightened, if necessary, by the hammer y and anvil e, the necessary opening for screws being made through the medium of the punch.

' Having thus described the nature, constrnction, and operation of my improvement, what I claim as of my invention, and desire to secure by Letters Patent, is-

' 1. In a machine for forming the strap part of hook-'and-eye hinges, the combination of the adjustable anvil f, and the reciprocating bending-die h, and die B, arranged and operating with relation to each other substantially as herein described, and for the purpose set forth.

2. In a machine for forming the strap part of hook-and-eye hinges, the combination of the adjustable anvilf, reciprocating bendingtially as herein described, and for the pur-' pose set forth.

3. In a machine for forming the strap part of hook-and-eye hinges, the combination of the reciprocating bending-dies B h, the hammer Q punch 3 and anvil 0, arranged and operating with relation to each other substantially as herein described, and for the purpose set forth.

4. In a machine for forming the strap part of hook-and-eye hinges, the combination of the adjustable base-piece g with the anvil f and reciprocating bending-die B, substantially as herein described, and for the purpose set forth.

CHARLES LANZ.

Witnesses:

A. O. JOHNSTON, D. I. K. RINE. 

